One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,10)(4,8)(5,14)(6,9)(7,12)(11,16)(13,15)(17,18,21,26,22,25,34,39)(19,23,29,37,28,36,43,47)(20,30,32,40,31,24,33,38)(27,35,42,46,41,45,44,48)(1,3,5,12,6,13,4,11)(2,7,8,10,9,16,14,15)(17,19,21,29,22,28,34,43)(18,23,26,37,25,36,39,47)(20,27,33,44,31,41,32,42)(24,35,40,48,30,45,38,46)(1,4,6,5)(2,8,9,14)(3,11,13,12)(7,10,16,15)(17,20)(18,24)(19,27)(21,33)(22,31)(23,35)(25,30)(26,40)(28,41)(29,44)(32,34)(36,45)(37,48)(38,39)(42,43)(46,47)(1,4,6,5)(2,8,9,14)(3,12,13,11)(7,15,16,10)(18,25)(23,36)(24,30)(26,39)(35,45)(37,47)(38,40)(46,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.